I had a dream a few nights ago, and I was almost lucid.
Dream:

i was swimming with my friend nathan around the ocean of an island. we were swimming to the middle of the area we were in, and i said, "oh, i've been here before nathan! i was here with my aunt, looking for starfish" and in reality, kind of HAD been there, in another dream. that wasn't the whole dream, just the important part. when i said i'd been there before, i remembered that it was a dream when i was there. so i remembered my dream in a dream. pretty close to lucidity, don't you think?
does anyone have a tip on how i could find out i'm in a dream besides reality checks?